Bump commons-io from 2.4 to 2.7

Bumps commons-io from 2.4 to 2.7.

Signed-off-by: dependabot[bot] <support@github.com>
(cherry picked from commit 59238ab)

Author: dependabot[bot]

pom.xml

@@ -75,7 +75,7 @@
         <openml-api.version>1.1.0</openml-api.version>
         <jackson.version>2.6.7</jackson.version>
         <jackson-databind.version>2.6.7</jackson-databind.version>
-        <commons-io.version>2.4</commons-io.version>
+        <commons-io.version>2.7</commons-io.version>
         <apache.version>1.8</apache.version>
     </properties>